24 July 2021 300 Series Stainless Steel
303Se Stainless Steel Plate
Grade 303Se stainless steel is a modified version of the basic grade 303, where selenium is substituted for sulfur to enable machining. Grade 303Se offers excellent machinability, good strength, and corrosion resistance. It has the capacity to resist scaling at temperatures up to 871°C (1600°F). This stainless steel is commonly used in parts requiring cold forming after machining.
Chemical Composition:
C: ≤0.15
Si: ≤1.00
Mn: ≤2.00
S ：≤0.060
P: ≤0.020
Cr: 17.00～19.00
Ni: 8.00～10.00
Mo: ≤0.60
Se≥0.15
Mechanical Properties:
Tensile strength σb (MPa): ≥520
Conditional yield strength σ0.2 (MPa): ≥205
Elongation δ5 (%): ≥40
Reduction of area ψ (%): ≥50
Hardness: HBW≤187; HRB≤90; HV≤200
Heat treatment specification and metallographic structure:
- Heat treatment specification: solid solution 1010～1150℃ and fast cooling.
- Metallographic structure: The structure is characterized by austenite type.
Delivery Status:
Generally, the delivery is in the heat treatment state, and the type of heat treatment is indicated in the contract; if it is not specified, the delivery is in the non-heat treatment state.